TRIM21 and antisynthetase syndrome: Chest x-ray showed bilateral infiltrates, and laboratory analysis revealed elevated creatinine kinase blood levels of 4822 U/L (normal < 170 U/L), and positive anti-Jo-1 antibody titers of 80 U/mL and anti-Ro52 titers of 104 U/mL (normal for both < 10 U/mL) suggestive of antisynthetase syndrome.